MIDIO 4 is the name of an encoder that converts UHT keyboard signals into MIDI signals for the organ. Up to four UHT keyboards of the series 40 can be connected (4 manual organ), so that a total of four of the 16 MIDI channels are assigned. Each manual is connected to the MIDIO 4 by a flat ribbon cable. If there are less than four manuals, the other connectors simply remain free. Special feature: In contrast to the standard UHT organ keyboards, the power supply is automatically provided by the MIDIO 4.

Commercially available MIDI cables must be used for the MIDI connections. They are not included in the scope of delivery.